A torsion beam for off-highway dump truck

Abstract

The present application relates to the technical field of automobile cross beam, and more particularly to a torsion-resistant cross beam of off-highway dump truck, comprising a main frame mechanism, a first beam body, a second beam body arranged in parallel with the first beam body on one side of the first beam body, a column beam with two ends respectively welded and fixed to one end of the first beam body and the second beam body, and a tail beam welded and fixed to the end of the first beam body and the second beam body, and a first torsion-resistant mechanism for resisting the torsion between the first beam body and the second beam body, the first and second torsion-resistant mechanisms can strengthen the overall strength of the cross beam, resist the torsion of the cross beam due to bumping, and solve the problem that the torsion of the cross beam will cause tearing and damage to the connection with the longitudinal beam. The anti-loosening fastening mechanism limits and clamps the end of the screw head and the threaded rod, plays a locking role in a high-strength vibration environment, and does not cause loosening of the threaded rod and affect the overall connection rigidity of the cross beam due to vibration, thereby reducing the generation of safety hazards.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobile cross beams, in particular to a torsion-resistant cross beam of a non-highway dump truck. BACKGROUND

[0002] The automobile cross beam is a main component of the automobile, which is used to ensure the torsional stiffness of the frame and bear the longitudinal load.

[0003] The existing non-highway dump truck is operated in a harsh environment in the mining area. The uneven road in the mining area seriously tests the frame of the non-highway dump truck. In extreme working conditions, the frame can be in a torsion state. In this state, the torsion force on the cross beam of the frame can cause tearing damage to the connection between the cross beam and the longitudinal beam. The damage of the key components can cause hidden dangers to the safe operation of the vehicle in the later period.

[0004] At the same time, the cross beam structure is usually fixed by bolts. The bolts can be loose in a severe jolt environment, which can further cause the cross beam to lose rigidity due to falling off. SUMMARY

[0005] This section aims to summarize some aspects of the embodiments of the present application and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract and title of the specification to avoid obscuring the purpose of this section, the abstract and the title. Such simplifications or omissions cannot be used to limit the scope of the present application.

[0006] In view of the above problems of the existing torsion-resistant cross beam of the non-highway dump truck, the present application is proposed.

[0007] Therefore, the purpose of the present application is to provide a torsion-resistant cross beam of a non-highway dump truck.

[0008] To solve the above technical problems, the present application provides the following technical solutions: a torsion-resistant cross beam of a non-highway dump truck, comprising,

[0009] The main frame mechanism comprises a first beam body, a second beam body arranged in parallel on one side of the first beam body, a column beam with two ends respectively welded and fixed to one end of the first beam body and the second beam body, and a tail beam welded and fixed to the end of the first beam body and the second beam body.

[0010] The first torsion-resistant mechanism is symmetrical and fixed to the inner side of the first beam body and the second beam body, and is used to counterbalance the torsion between the first beam body and the second beam body.

[0011] The anti-loosening fastening mechanism is arranged in several groups, and is used to assemble the first torsion-resistant mechanism and fix the two ends of the first torsion-resistant mechanism to the inner side of the first beam body and the second beam body, respectively.

[0012] As a preferred scheme of the off-highway dump truck torsion-resistant crossbeam, the first torsion-resistant mechanism comprises a frame in a "H" shape, a first torsion-resistant piece in a "N" shape fixed to the inside of the frame, mounting seats fixed symmetrically to the two ends of the frame, a first assembly hole opened at the three ends of the first torsion-resistant piece, a second assembly hole opened on the upper and lower sides of the frame and corresponding to the position of the first assembly hole, and a mounting hole opened on the surface of the mounting seat.

[0013] As a preferred scheme of the off-highway dump truck torsion-resistant crossbeam, the anti-loosening fastening mechanism comprises a limiting component fixed to the positions of the second assembly hole and the mounting hole, a jamming component fixed to the position of the first assembly hole and the outside of the first beam body and the second beam body and corresponding to the position of the mounting hole, and a bolt component for fixing the frame and the first torsion-resistant piece and the mounting seat and the first beam body and the second beam body by thread connection of the limiting component and the jamming component respectively.

[0014] As a preferred scheme of the off-highway dump truck torsion-resistant crossbeam, the limiting component comprises a first cylinder, a movable cavity opened at one end of the first cylinder, a spring cavity opened in the inside of the first cylinder and communicated with the movable cavity, a spring arranged in the spring cavity, a movable ring movably inserted into the movable cavity, a limiting ring movably arranged in the spring cavity and fixedly connected with one end of the movable ring extending into the spring cavity, a sleeve ring fixed to the other end of the movable ring, a limiting tooth arranged on the inside of the sleeve ring, and a first internal thread opened at the axis of the first cylinder.

[0015] As a preferred scheme of the off-highway dump truck torsion-resistant crossbeam, the slot width of the spring cavity is greater than the slot width of the movable cavity, and the width of the limiting ring is adapted to the slot width of the spring cavity.

[0016] As a preferred scheme of the off-highway dump truck torsion-resistant crossbeam, the jamming component comprises a second cylinder, a second internal thread through the axis of the second cylinder, a spring sheet arranged at one end of the second cylinder, a connecting block for fixing the spring sheet to the end of the second cylinder, and a plurality of fan-shaped cards equidistantly arranged on the inside of the spring sheet.

[0017] As a preferred scheme of the off-highway dump truck torsion-resistant crossbeam, the spring sheet and the fan-shaped cards are both alloy spring steels, and the spring sheet and the fan-shaped cards are integrally formed by stamping.

[0018] As a preferred scheme of the off-highway dump truck torsion-resistant crossbeam, the bolt component comprises a screw head, a threaded rod fixed to one end of the screw head and threadedly connected with the first internal thread and the second internal thread, a clamping column fixed to one end of the threaded rod, and a clamping groove equidistantly opened on the outside of the clamping column.

[0019] As a preferred scheme of the off-highway dump truck torsion-resistant crossbeam, the second torsion-resistant mechanism comprises a reinforcing assembly and a fixing assembly for fixing the reinforcing assembly to the first beam body, the second beam body and the tail beam respectively.

[0020] As a preferred scheme of the off-highway dump truck torsion-resistant crossbeam, the reinforcing assembly comprises two beam bodies arranged in an up-down manner, a reinforcing rib fixed to the two beam bodies in an X shape by equidistant welding, and a triangular end head fixed to the first beam body and the second beam body at both ends of the two beam bodies respectively.

[0021] The fixing assembly comprises an L-shaped block fixed to the right angle at both ends of the two beam bodies and abutting against the second beam body and the tail beam and the first beam body and the tail beam respectively, a bolt penetrating through the L-shaped block, the second beam body, the second beam body and the tail beam, a nut screwed on the bolt, a through hole formed at one end of the bolt, and a snap ring penetrating through the through hole.

[0022] The off-highway dump truck torsion-resistant crossbeam has the following advantages: the first torsion-resistant mechanism and the second torsion-resistant mechanism can strengthen the overall strength of the first beam body, the second beam body and the tail beam, and can resist the torsion of the crossbeam caused by bumping to the greatest extent, thereby solving the problem that the torsion of the crossbeam can cause tearing damage to the connection between the crossbeam and the longitudinal beam, and ensuring the safe operation of the whole vehicle in the later period.

[0023] The anti-loosening fastening mechanism limits and clamps the end of the screw head and the threaded rod, can play a locking role in a high-strength vibration environment, and will not cause the threaded rod to loosen and affect the overall connection rigidity of the crossbeam due to vibration, thereby ensuring the strength of the crossbeam to the greatest extent and reducing the generation of safety hazards. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor. Among them:

[0025] Figure 1 It is a schematic diagram of the overall structure of the off-highway dump truck torsion-resistant crossbeam.

[0026] Figure 2 It is a schematic diagram of the structure of the main frame mechanism in the off-highway dump truck torsion-resistant crossbeam.

[0027] Figure 3 It is a schematic diagram of the structure of the first torsion-resistant mechanism in the off-highway dump truck torsion-resistant crossbeam.

[0028] Figure 4It is a cross-sectional structure schematic diagram of the first torsion resistance mechanism in the torsion resistance cross beam of the off-highway dump truck of the present application.

[0029] Figure 5 It is a structure schematic diagram of the limiting assembly in the torsion resistance cross beam of the off-highway dump truck of the present application.

[0030] Figure 6 It is a structure schematic diagram of the jamming assembly in the torsion resistance cross beam of the off-highway dump truck of the present application.

[0031] Figure 7 It is a structure schematic diagram of the bolt column assembly in the torsion resistance cross beam of the off-highway dump truck of the present application.

[0032] Figure 8 It is a structure schematic diagram of the second torsion resistance mechanism in the torsion resistance cross beam of the off-highway dump truck of the present application. DETAILED DESCRIPTION

[0033] In order to make the above objectives, features and advantages of the present application more apparent and comprehensible, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0034] In the following description, a lot of specific details are set forth in order to provide a thorough understanding of the present application, but the present application can also be implemented in other ways different from those described herein, and those skilled in the art can make similar generalizations without departing from the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0035] Secondly, the "one embodiment" or "embodiment" referred to herein means that the specific features, structures or characteristics can be included in at least one implementation of the present application. "In one embodiment" appearing in different places in the specification does not mean the same embodiment, nor is it an embodiment that is independent of or selected from other embodiments.

[0036] Thirdly, the present application is described in detail in conjunction with the schematic diagram, and in the detailed description of the embodiments of the present application, the cross-sectional view of the device structure is partially enlarged without the general proportion for the convenience of description, and the schematic diagram is only an example, which should not limit the scope of protection of the present application herein. In addition, three-dimensional spatial dimensions including length, width and depth should be included in actual manufacture.

[0037] Embodiment 1

[0038] Reference Figure 1 , provides a whole structure schematic diagram of a torsion resistance cross beam of an off-highway dump truck, such as Figures 1-3 A torsion resistance cross beam of an off-highway dump truck, comprising,

[0039] The main frame mechanism 100 comprises a first beam body 101, a second beam body 102 arranged on one side of the first beam body 101 in parallel, a column beam 103 welded and fixed at one end of the first beam body 101 and the second beam body 102 respectively, and a tail beam 104 welded and fixed at the end of the first beam body 101 and the second beam body 102. The first beam body 101, the second beam body 102, the column beam 103 and the tail beam 104 are all made of alloy hot-rolled steel material. The thickness of the first beam body 101 and the second beam body 102 is 12 mm, the diameter of the column beam 103 is 10 mm, and the thickness of the tail beam 104 is 0.8 mm. The alloy hot-rolled steel has high strength and rigidity, can bear large load and impact force, and can maximize the overall strength of the cross beam.

[0040] The first torsion resistance mechanism 200 is symmetrically fixed to the inner sides of the first beam body 101 and the second beam body 102, and is used to resist the torsion between the first beam body 101 and the second beam body 102.

[0041] The anti-loose fastening mechanism 300 is arranged in several groups, and is used to assemble the first torsion resistance mechanism 200 and fix the two ends of the first torsion resistance mechanism 200 to the inner sides of the first beam body 101 and the second beam body 102 respectively.

[0042] Further, the first torsion resistance mechanism 200 comprises a frame 201 in the shape of a "Fang" character, a first torsion resistance member 202 fixed equidistantly to the inner side of the frame 201 in the shape of a "Ru" character, mounting seats 203 fixed symmetrically at both ends of the frame 201, first assembly holes 204 opened at three ends of the first torsion resistance member 202, second assembly holes 205 opened at the upper and lower sides of the frame 201 and corresponding to the positions of the first assembly holes 204, and mounting holes 206 opened on the surface of the mounting seats 203. The positions of the first assembly holes 204 correspond to the second assembly holes 205 vertically, and the outer sides of the first beam body 101 and the second beam body 102 correspond to the positions of the mounting holes 206 and are provided with through holes matched with the mounting holes 206.

[0043] Further, the anti-loose fastening mechanism 300 comprises a limiting component 301 fixed at the positions of the second assembly holes 205 and the mounting holes 206, a jamming component 302 fixed at the positions of the first assembly holes 204 and the outer sides of the first beam body 101 and the second beam body 102 and corresponding to the positions of the mounting holes 206, and a bolt component 303 used to fix the frame 201 and the first torsion resistance member 202 and the mounting seats 203 and the first beam body 101 and the second beam body 102 by thread connection of the limiting component 301 and the jamming component 302 respectively.

[0044] Operation process: when installing, the first beam body 101 and the second beam body 102 are placed in parallel, the column beam 103 and the tail beam 104 are placed at both ends of the first beam body 101 and the second beam body 102 respectively, and then the fixing is completed by welding.

[0045] Secondly, the mounting seat 203 is welded and fixed at both ends of the frame 201, and then the first torsion-resistant member 202 is placed inside the frame 201, and the first assembly hole 204 and the second assembly hole 205 are assembled through the anti-loosening fastening mechanism 300. Finally, the installation of the first torsion-resistant mechanism 200 is completed by passing through the mounting hole 206 and penetrating the first beam body 101 and the second beam body 102 through the anti-loosening fastening mechanism 300, which can strengthen the overall strength of the first beam body 101 and the second beam body 102, and resist the torsion of the cross beam caused by bumps to the greatest extent, solve the problem that the cross beam is torn and damaged at the connection with the longitudinal beam due to the torsion, and ensure the safe operation of the whole vehicle in the later period.

[0046] Embodiment 2

[0047] Referring to Figures 4-7 The difference between this embodiment and the first embodiment is that the limiting assembly 301 includes a first cylinder 301a, a movable cavity 301b opened at one end of the first cylinder 301a, a spring cavity 301c opened in the inside of the first cylinder 301a and communicated with the movable cavity 301b, a spring 301d arranged in the spring cavity 301c, a movable ring 301e movably inserted into the movable cavity 301b, a limiting ring 301f movably arranged in the spring cavity 301c and fixedly connected with one end of the movable ring 301e extending into the spring cavity 301c, a sleeve ring 301g fixed to the other end of the movable ring 301e, a limiting tooth 301h arranged on the inside of the sleeve ring 301g, and a first internal thread 301i opened at the axis of the first cylinder 301a. The first cylinder 301a is welded and fixed to the surface of the frame 201, the mounting seat 203, and the positions corresponding to the second assembly hole 205 and the mounting hole 206, respectively. The inside of the movable cavity 301b is equidistantly provided with a limiting groove, the outside of the limiting ring 301f is fixed with a protrusion at a position corresponding to the limiting groove, and the length of the protrusion is 1 / 2 of the height of the limiting ring 301f.

[0048] Further, the groove width of the spring cavity 301c is greater than the groove width of the movable cavity 301b, the width of the limiting ring 301f is adapted to the groove width of the spring cavity 301c, and the width of the limiting ring 301f can move in the spring cavity 301c but not out of the movable cavity 301b. At the same time, the limiting ring 301f can compress the spring 301d when it moves in the spring cavity 301c, and the spring 301d can provide space for the movement of the movable ring 301e after being compressed.

[0049] Further, the jamming assembly 302 comprises a second cylinder 302a, a second internal thread 302b formed through the axial center of the second cylinder 302a, a spring sheet 302c arranged at one end of the second cylinder 302a, a connecting block 302d for fixing the spring sheet 302c to the end of the second cylinder 302a, and a plurality of fan-shaped cards 302e arranged at the inner side of the spring sheet 302c at equal intervals. The second cylinder 302a is welded and fixed to the first torsion-resistant member 202, the first beam 101 and the second beam 102 at positions corresponding to the through holes.

[0050] Further, the spring sheet 302c and the fan-shaped card 302e are both made of alloy spring steel, and the spring sheet 302c and the fan-shaped card 302e are integrally formed by stamping, so that the integrated structure has high strength and good fatigue resistance.

[0051] Further, the bolt assembly 303 comprises a screw head 303a, a threaded rod 303b fixed to one end of the screw head 303a and threadedly connected to the first internal thread 301i and the second internal thread 302b, a clamping column 303c fixed to one end of the threaded rod 303b, and a plurality of clamping grooves 303d formed at equal intervals on the outer side of the clamping column 303c. The screw head 303a has a pentagonal structure, which is convenient for limiting by abutting the five corners of the screw head 303a against the limiting teeth 301h. The diameter of the clamping column 303c is smaller than the diameter of the threaded rod 303b, so that the clamping column 303c does not contact the first internal thread 301i and the second internal thread 302b. There are three fan-shaped cards 302e, which extend into the clamping grooves 303d to form clamping.

[0052] The remaining structures are the same as those of Example 1.

[0053] Operation process: when assembling and installing the first torsion-resistant mechanism 200, first, the first cylinder 301a is welded and fixed to the frame 201, the mounting surface 203 and the positions corresponding to the second assembly hole 205 and the mounting hole 206, respectively. The second cylinder 302a is welded and fixed to the first torsion-resistant member 202, the first beam 101 and the second beam 102 at positions corresponding to the through holes.

[0054] When assembling, the first torsion-resistant member 202 is placed in the frame 201, and during placement, the second assembly hole 205 is ensured to correspond to the first assembly hole 204, further, the threaded rod 303b is inserted from the first internal thread 301i while holding the screw head 303a by hand, when the thread on the threaded rod 303b contacts the first internal thread 301i, rotation is started, until there is no rotation by hand, then the torque wrench is prepared, one hand holds the collar 301g and forces it inward, so that the movable ring 301e moves in the movable cavity 301b, and at the same time the limiting ring 301f can compress the spring 301d, after the spring 301 is compressed, it can provide space for the movement of the movable ring 301e, until the surface of the collar 301g is flush with the surface of the first cylinder 301a, then the screw head 303a is twisted by using the torque wrench, after the screw head 303a is twisted, the threaded rod 303b is screwed into the second internal thread 302b through the first internal thread 301i, and at the same time the clamping column 303c at the end of the threaded rod 303b abuts against the fan-shaped clamping piece 302e, after the fan-shaped clamping piece 302e is stressed, it deforms along the outer side surface of the clamping column 303c, and in the continuous movement of the clamping column 303c driven by the threaded rod 303b, the fan-shaped clamping piece 302e slides along the outer side of the clamping column 303c, until it is clamped in the clamping groove 303d, when the torque of the torque wrench is appropriate, stop twisting, release the collar 301g, and under the action of the spring 301d, the collar 301g resets and is sleeved on the outside of the screw head 303a, and the limiting teeth 301h limit the five corners of the screw head 303a to form limiting, completing the assembly of the first torsion-resistant mechanism 200.

[0055] When installing the first torsion-resistant mechanism 200, the first torsion-resistant mechanism 200 is placed between the first beam body 101 and the second beam body 102, and the installation hole 206 is ensured to coincide with the through hole, and the first torsion-resistant mechanism 200 is fixed to the inner side of the first beam body 101 and the second beam body 102 in the assembled manner;

[0056] The structure limits and clamps the end of the screw head 303a and the threaded rod 303b, can play a locking role in a high-strength vibration environment, and will not cause the threaded rod 303b to loosen and affect the overall connection rigidity of the beam due to vibration, thereby maximizing the strength of the beam and reducing the generation of safety hazards.

[0057] Embodiment 3

[0058] With reference to Figure 8 The difference between this embodiment and the above embodiments is that the off-highway dump truck torsion-resistant beam further comprises a second torsion-resistant mechanism 400, and the second torsion-resistant mechanism 400 comprises a reinforcing assembly 401 and a fixing assembly 402 for fixing the reinforcing assembly 401 to the first beam body 101, the second beam body 102 and the tail beam 104 respectively.

[0059] Further, the reinforcing assembly 401 comprises two beams 401a arranged vertically, a reinforcing rib 401b fixed between the two beams 401a in an "X" shape, and a triangular end 401c fixed to the first beam 101 and the second beam 102 at the ends of the two beams 401a, the beams 401a, the reinforcing rib 401b, and the triangular end 401c are integrally formed by casting, and have high strength and rigidity.

[0060] The fixing assembly 402 comprises an L-shaped block 402a fixed to the two right-angled positions between the two beams 401a and abutting the second beam 102 and the tail beam 104 and the first beam 101 and the tail beam 104, respectively, a bolt 402b penetrating the L-shaped block 402a, the second beam 102, the second beam 102, and the tail beam 104, a nut 402c screwed on the bolt 402b, a through hole 402d penetrating the end of the bolt 402b, and a clasp 402e penetrating the through hole 402d.

[0061] The remaining structures are the same as those of Embodiment 2.

[0062] Operation process: During installation, the L-shaped block 402a is fixed by welding to the two right-angled positions between the two beams 102, and after being fixed, it is placed between the first beam 101, the second beam 102, and the tail beam 104, the bolt 402b is passed through, and then the nut 402c is screwed, after screwing, the clasp 402e is clamped into the through hole 402d to complete the fixing, this structure can strengthen the overall strength of the first beam 101, the second beam 102, and the tail beam 104, and can resist the torsion of the cross beam caused by bumps to the greatest extent, solve the problem that the torsion of the cross beam will cause tearing and damage to the connection between the cross beam and the longitudinal beam, and ensure the safe operation of the whole vehicle in the later period.

[0063] It is important to note that the construction and arrangement of the application shown in the various exemplary embodiments is illustrative only. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review the present disclosure will readily appreciate that many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters, mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the novel teachings and advantages of the subject matter described herein. For example, elements shown as integrally formed can be constructed of multiple parts or elements, the position of elements can be reversed or otherwise varied, and the nature or number of elements or positions can be altered or varied. Thus, the foregoing description is by way of example only, and is not intended to be limiting. The application is limited only as defined in the following claims and equivalents thereto. The sequence of any process or method steps, or the order in which they are carried out, can be altered or re-ordered without departing from the scope of the application. Any "articles of manufacture" or "manufacturing" as described herein are intended to encompass structures constructed of a multitude of different physical elements or components. In the claims, any means-plus-function clause is intended to cover the structures described herein as performing the recited function and also cover structures yet to be invented which perform the recited function but operate in a different manner. Other substitutions, modifications, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the application as expressed in the appended claims.

[0064] Also, to provide a concise description of the exemplary embodiments, not all features of an actual implementation can be described (that is, not all implementations can include all of the features described or optional implementations can include only a subset of the features described).

[0065] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions can be made. Such development efforts can inevitably lead to modifications, not all of which can be foreseen in advance. Such modifications are not to be regarded as a departure from the spirit and scope of the present application, and all such modifications are intended to be included within the scope of the present application. The disclosure is not a complete description of the actual implementation, nor is it intended to be so; thus, what is actually devised can depart from what is described in this disclosure.

[0066] It should be noted that the above examples are merely intended to illustrate the technical solutions of the present application but not to limit the present application, and although the present application is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or equivalently replaced without departing from the spirit and scope of the present application, and all such modifications and equivalents are intended to be included within the scope of the claims of the present application.

Claims

1. A torsion beam for an off-highway dump truck, characterized by: The utility model relates to a kind of main frame mechanism (100), including first beam body (101), second beam body (102) being located first beam body (101) one side and being arranged in parallel with it, column beam (103) is respectively welded and fixed in one end of first beam body (101) and second beam body (102), and tail beam (104) is welded and fixed in the end of first beam body (101) and second beam body (102); First torsion-resisting mechanism (200), two groups are included, symmetrically fixed in the inside of first beam body (101) and second beam body (102), for counteracting the torsion between first beam body (101) and second beam body (102); Anti-loosening fastening mechanism (300) is arranged in several groups, for assembling first torsion-resisting mechanism (200) and respectively fixing and installing two ends of first torsion-resisting mechanism (200) in the inside of first beam body (101) and second beam body (102); The first torsion-resisting mechanism (200) includes frame (201) in " " character shape structure, first torsion-resisting member (202) in " " character shape structure fixed equidistantly in the inside of frame (201), mounting seat (203) fixed symmetrically in both ends of frame (201), first assembly hole (204) opened in three end portions of first torsion-resisting member (202), second assembly hole (205) opened in upper and lower sides of frame (201) and corresponding the position of first assembly hole (204), and mounting hole (206) opened in the surface of mounting seat (203); The anti-loosening fastening mechanism (300) includes limiting component (301) fixed in the position of second assembly hole (205) and mounting hole (206), jamming component (302) fixed in the position of first assembly hole (204) and outside first beam body (101) and second beam body (102) and corresponding the position of mounting hole (206), bolt column component (303) for connecting limiting component (301) and jamming component (302) by thread respectively to fix frame (201) and first torsion-resisting member (202) and mounting seat (203) and first beam body (101) and second beam body (102); The limiting component (301) includes first cylinder (301a), movable cavity (301b) opened in one end of first cylinder (301a), spring cavity (301c) opened in the inside of first cylinder (301a) and communicated with movable cavity (301b), spring (301d) arranged in spring cavity (301c), movable ring (301e) movably inserted into movable cavity (301b), limit ring (301f) movably arranged in spring cavity (301c) and fixedly connected with one end of movable ring (301e) extending into spring cavity (301c), sleeve ring (301g) fixed in the other end of movable ring (301e), limit tooth (301h) arranged in the inside of sleeve ring (301g), and first internal thread (301i) opened in the axis of first cylinder (301a). ​ 2. The off-highway dump truck torsion beam of claim 1, wherein: The slot width of the spring cavity (301c) is greater than the slot width of the movable cavity (301b), and the width of the limiting ring (301f) is adapted to the slot width of the spring cavity (301c).

3. The off-highway dump truck torsion beam of claim 2, wherein: The jamming assembly (302) comprises a second cylinder (302a), a second internal thread (302b) penetratingly arranged at the axial center of the second cylinder (302a), a spring sheet (302c) arranged at one end of the second cylinder (302a), a connecting block (302d) for fixing the spring sheet (302c) to the end of the second cylinder (302a), and a fan-shaped card (302e) equidistantly arranged inside the spring sheet (302c).

4. The off-highway dump truck torsion beam of claim 3, wherein: The spring sheet (302c) and the fan-shaped card (302e) are both alloy spring steels, and the spring sheet (302c) and the fan-shaped card (302e) are integrally formed by stamping.

5. The off-highway dump truck torsion beam as described in claim 4, wherein: The pin column assembly (303) comprises a screw head (303a), a threaded rod (303b) fixed at one end of the screw head (303a) and threadedly connected with the first internal thread (301i) and the second internal thread (302b), a clamping column (303c) fixed at one end of the threaded rod (303b), and a clamping groove (303d) equidistantly arranged outside the clamping column (303c).

6. The off-highway dump truck torsion beam as described in claim 5, wherein: Further comprising a second anti-torsion mechanism (400), the second anti-torsion mechanism (400) comprising a reinforcing assembly (401) and a fixing assembly (402) for fixing the reinforcing assembly (401) to the first beam body (101), the second beam body (102) and the tail beam (104) respectively.

7. The off-highway dump truck torsion beam as described in claim 6, wherein: The reinforcing assembly (401) comprises two beam bodies (401a) arranged in an up-down manner, a reinforcing rib (401b) equidistantly welded and fixed between the two beam bodies (401a) in an "X" shape, and a triangular end head (401c) fixed at both ends of the two beam bodies (401a) and abutting against the first beam body (101) and the second beam body (102) respectively. The fixing assembly (402) comprises an L-shaped block (402a) fixed at the right angle of both ends of the two beam bodies (401a) and abutting against the second beam body (102) and the tail beam (104) and the first beam body (101) and the tail beam (104) respectively, a bolt (402b) penetrating through the L-shaped block (402a), the second beam body (102), the second beam body (102) and the tail beam (104), a nut (402c) threadedly connected to the bolt (402b), a through hole (402d) penetratingly arranged at one end of the bolt (402b), and a clamping ring (402e) penetrating through the through hole (402d).

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